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What Is Known about This Topic? • To date, there is only one report of a double RET mutation, i.e. V804M/Y806C, in a patient with the MEN 2B phenotype. • Previous in vitro studies have suggested that these double mutations are on the same
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). Most cases of MTC carry mutations in the proto-oncogene known as rearranged during transfection ( RET ), which can be either germline (in ≥95% of patients with hereditary MTC) or somatic (in about half of cases of sporadic MTC) ( 5 , 8 , 9 , 10 , 11
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renewal and differentiation [ 6 , 16 ]. In accordance, individuals with germline loss-of-function mutations of RET are affected by congenital megacolon or Hirschsprung disease characterized by intestinal aganglionosis [ 17 ]. Gain-of-function mutations
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suggestive of a hereditary form (QOE = +++; SOR = score 1). (b) If the diagnosis of MTC is made preoperatively, apparently sporadic MTC patients must be investigated for the presence of RET gene mutations (see the following paragraph) and, if positive
Institute of Pathology, University Hospital Halle (Saale), Halle (Saale), Germany
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mutation-positive medullary thyroid cancer (MTC) or RET gene fusion-positive thyroid cancer. The early approval of these drugs was based on phase 1/2 data ( 1 , 2 , 3 , 4 , 5 ). Patients with thyroid cancer were one of the larger patient groups in the
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What Is Known about This Topic? • The pathogenic effect of the p.Val804Met missense mutation of the RET proto-oncogene is well described in familial medullary thyroid cancer. In contrast, the clinical significance of the novel missense
Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
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Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
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Department of Ultrasound, Fudan University Shanghai Cancer Center, Shanghai, China
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Department of Head and Neck Surgery, Fudan University Shanghai Cancer Center, Shanghai, China
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Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
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-activated protein kinase (MAPK) and phosphatidylinositol 3-kinase (PI3K) pathways, including point mutations in BRAF , RAS , RET , TP53 , PTEN , and PIK3CA and chromosomal rearrangements in RET , NTRK , and PPARG ( 2 ). Large-scale studies have fully
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Established facts Paraneoplastic Cushing’s syndrome is dangerous and can be life-threatening. There are few results regarding the efficacy of RET inhibitor treatment in medullary thyroid carcinoma (MTC) with RET mutation
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) pathway for the large majority of PTCs ( 5 ). Among this cohort, BRAF V600E mutation was present in nearly 60% of PTCs, followed by HRAS and NRAS mutations in 10% of cases and RET fusions in ~5% of cases ( 5 ). Therapeutic approaches that inhibit
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add greatly to the available literature. Introduction Multiple endocrine neoplasia (MEN) 2A is an autosomal dominant disorder that results from a mutation in the RET proto-oncogene on chromosome 10 [ 1 , 2 ]. Almost 100% of affected